A. There shall be elected by the qualified voters of each parish police jury ward, or the equivalent thereof, of each parish of the state a member of the school board of the parish for each police juror in said ward, or the members of a parish school board shall be elected by the qualified voters in accordance with the school board reapportionment plan then in effect as authorized by law, or the members of a parish school board shall be elected in accordance with any special law applicable to the board, as the case may be. Members of parish school boards shall be elected at the congressional elections. Members elected in 1986 and thereafter shall serve four-year concurrent terms beginning January 1 following their election. In order to implement the concurrent terms provided for herein, those members of the parish school boards who are elected in 1980 shall serve six-year terms beginning January first following their election, those members of the parish school boards who are elected in 1982 shall serve four-year terms beginning January first following their election, and those members of the parish school boards who are elected in 1984 shall serve two-year terms beginning January first following their election. For purposes of the election of school board members in the election years 1980, 1982, and 1984 the parish school boards of the several parishes, as occasion may arise on account of the increase in the membership by the creation of additional wards or the increase of membership for any single ward, shall by proper resolution maintain the three divisions of the membership of the school boards existing on July 28, 1948, as nearly equal as possible by allotting such new members to one of the three divisions, and when so allotted the term of office of such new member or members shall expire at the same time as the terms of the other members of the said division. Thereafter, the election of additional school board members shall be in accordance with the provisions herein made applicable to the election of school board members in the election year 1986.